Where is the neutral safety switch located?

As noted:
FWIW, most lever position switches are/were mounted further down the steering column so that they were relatively easy to access.

The neutral safety switch is used to determine the position of the transmission gear select lever. It is to prevent starting the engine with the car in gear. It is also called the MLPS, or Manual Lever Position Sensor, depending on who wrote the book and more likely when. Older name was neutral safety, newer name as noted because it also tells the transmission computer if you are using OD, locking the gears in 1 or 2, or ??? you pick it... What year is your truck?